Contact us
Choose a category below so we can get back to you as quickly as possible.
化簡,得0.4x+21=69 移項,得0.4x=69-21 合併同類項,得0.4x=48 兩邊同除以0.4,得x=120 lz一步都沒有簡略啊,是初一的吧?
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.